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arXiv · 1110.2171

Charged-Particle Decay at Finite Temperature

Andrzej Czarnecki·Marc Kamionkowski·Samuel K. Lee·Kirill Melnikov
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Abstract

Radiative corrections to the decay rate of charged fermions caused by the presence of a thermal bath of photons are calculated in the limit when temperatures are below the masses of all charged particles involved. The cancellation of finite-temperature infrared divergences in the decay rate is described in detail. Temperature-dependent radiative corrections to a two-body decay of a hypothetical charged fermion and to electroweak decays of a muon are given. We touch upon possible implications of these results for charged particles in the early Universe.

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Andrzej Czarnecki, Marc Kamionkowski, Samuel K. Lee, Kirill Melnikov. 2012-03-06. Charged-Particle Decay at Finite Temperature. https://doi.org/10.1103/physrevd.85.025018

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